Machine for making multiple fastener elements



Nov. 22, 1927.

A J. E. PERRAULT MACHINE FOR MAKING MULTIPLE FASTENER ELEMENTS Filed' June 2, 192e 5 Sheets-Sheet l @wwwa/ Nw MW. A

l wmfLQmMuzi/m/MW Jxeph E'. Berga uli',

Nov. 22, 1927.

1,649,854 J. E. PERRAULT MACHINE FOR MAKING MULTIPLE FASTENER ELEMENTS 5 Sheets-Sheet 2 Filed June 2, 1926 84/ Y Innen/ivf.'

' JsepkEI/erraulg Nov. 22, 1927.

J. E. PERRAULT MACHINE FOR MAKING MULTIPLE `FASTENEJR ELEMENTS Nov. 22, 1927. 1,649,854

J. E. PERRAULT MACHINE FOR MAKING MULTIPLE FASTENER ELEMENTS Filed yJune 2, 1926 5 Sheets-Sheet 4 Inventor.'

Josep/L E Beraul',

v 1,649,854 J. E. PERRAULT v MACHINE FOR MAKING 'MULTIPLE ASTENER ELEMENTS Filed June 26 5 Sheets-Sheet 5 Navf'zz", 1927'.

Patented Nov. 22,

UNITED --sixA'rEsI PATENT foFF-1cnaf..

JOSEPH E. PERRAULT, or wATEETowN, MASSACHUSETTS, AssIGNon `'To Hoon no3- BEII COMPANY, OF CHUSETTS.

vWATlszaTown, MAssAenUsETTS, A conroaATroN or nassamAcnINE Eon MAKING MULTI'P'LE- EAsTENEn ELEMENTS.

- Application 1ed. June 2, 1926. `VSerial No. 113,274.

ments of multiple fasteners of the type disclosed in Letters Patent of the United States l issued to the Hood Rubber Company, as-

signee on the 26thvday of J anuaryf1926.

In' devising the Said invention I have aimed to provide a method and machine by which such fastener elements can be produced rapidly,y economically and with eX- treme accuracy as to size and shape.

I have also aimed to provide a machine by which multiple stock/rods can be supplied to the apparatus and manipulated or worked thereby.

I have further aimed to provide apparatus in which the stock rod or rods will at all times be properly held and its position for the successiveoperations accurately gauged, and in which accidental operation of machine parts will be absolutely prevented.

With these and other objects in view, which will hereinafter appear, the inven ion includes the novel method of operation 'l nd form of apparatus for carrying out such method as hereinafter described, what I claim as my invention being de ned and ascertained by the claims appended hereto.

`What I at present consider the preferred embodiment of the apparatus included in my invention, is illustrated in the accompany# ing drawings, in which 1- Figure 1 is a plan view with vthe belt drives and table omitted for clearness of illustration.

Fig. 2 is an end elevation of thecomplete machine. Fig. 3 is an 'enlarged longitudinalver-tical section through the chuck and associated parts. A

Figs. 4 is a transverse section on line 4-4 ofFig.3.

Fig. 5 is anelevation taken on line 5--5 of Fig. 1, with parts in section. Fig. 6 is an enlarged sectional elevation on line 6 6 of Fig. 3,l showing the indexing.

mechanism disengaged. l Y

,Fig 7 is a detail elevation of the drive pulley and control mechanism.

Figs. 8, 9, 10 and 11 are'enlarged sectional detail views illustrating the chuck` and cooperating parts in their sequence of operations. c

Fig. 12 is a perspective of a. fastener Amember as vproduced by the machine. i

Fig. 12a is a view of the completed article slotte/d for application to the carrying tape.

Figs. 13 and 14 are detail views ofthe tube holder. f

In these drawings s imilar' reference characters indicate the same or like parts whenever used.

The machine is intended to produce an article in the form shown at A', Fig. 12, from solid stock b ars A, of substantially rectangular shape 1n cross section, said articles or elements having transverse openings a vand approximately arrow shaped heads a2. The

stock bars are of malleable metal such as brass and are madejwith their opposed edges rounded as indicated at- Av in the articlel Fig. 12.

Briefly stated, the machine includes means whereby the stock bar is fed forward until its end contacts with asuitable stop and it is rotated *while suitable cutters operate thereon to provide'J icone-shaped portion and an annular grove at the base thereof. Thereafter the stock bar is held stationary in predeter mined position-while suitable drilling devices form a hole through the stock bar adjacent the groove and cutting devices trim olf opposite faces of the cone-shaped end to form v21,-substantially fiat arrow-shaped head, whereafter the cycle .of operations is rep eated.

In the apparatus shown in the drawings I Y each`stock bar is inserted in a tube 1 havingan elongated slot 1"' therein, the' tube bemg of an internal diametergto permit the bar to rotate and slide freely therein while holding it against bending or vibration,

vThe loadedctube is placed yin a receiving trough 2, preferably lined with a cushion surfacing material 2i, and the tube has its forward end secured in a holding member 3 which in the embodiment vshown takes the form of a post having a transverse e o or opening in which the end of the tu ve is clamped by set. screw 3.

lifted out of its trough for refilling and replacement.

Within the tube is located a rod pusher orl follow-up member 4 which has a web or lug 4a 4extending up through the slot to which is connected means tending constantly to move the pusher and rod in a feed direction or towards the cutters hereinafter described (towards the right Fig.1).

The troughs and holding members are disposed so that the rods will be held in axial alignment with the holding and rotating chucks, one of which is shown in an enlarged section in Fig. 3.

This comprises a tubular member 5, or chuck spindle mounted in suitable bearings 6 in the head stock 6, within which is slidably mounted a tubular chuck carrying member 7 which carries at its forward end vthe tube gripping jaws 7a which are adapted gagement with the tube by longitudinal lmovement of the member 7 to the left, Fig.

3, through the coaction -of theirv outer inclined faces with the flaredportion of the inner wall ofthe chuck socket adjacent its end. For effecting axial movement of the jaw-carrying member 7, I provide the chuck socket member 5 with a collar 5 fast thereon, and the projecting portion of the member 7 with a suitablecollar 7b fast thereon, and having an annular wall adjacent to but spaced from th'e end wall of collar 5*, one of these walls, as for example the wall ,of collar v7b being inclined so that an `annular outwardly flared channel is provided bev tween thetwo collars. Within this channel `1s arranged an annular series of balls which are encircled and held in place by a shiftable ring 8 having an linternal annular'inclined ball engaging wall 8. Ring 8 has an annular groove 8l which is engaged by a projection on a shifter member'9 slidably mounted ona cross pin 10 supported by the forked bracket 11 carried by the head stock and actuated `by a hand operated shifterlever 12 (Figs. l and 3). Lever 12 is secured to a pin or. short shaft 13, rotatably held in a corresponding hole in the bottombwall of the bracket through which it projects and is provided with an elongated slot which is englaged by a lug or projection 9l depending om the shifter member 9.

ovement of the shifter member 9 to the vvright (Fig. 3).imparts corresponding movement to the clutch ring 8 and the inner 1nclined Aannular wall thereof forces the balls radially inward. This movement hof the balls, throu-ghthe Wedge-shape of the space between collars 5 and 7", forces the jaw-carrying member to the left thereby causing the jaws 7a to grip the stock rod.

en the jawsare open the stock rod is fed forward automatically by a flexible element 14 which has one end secured to tn -lug 4a of the follow-up plunger, the other end being passed over a pulley 1'5 journaled on a fixed support and provlded with tension means such as a weight (not shown).

Pin or shaft 13 carriesan arm 16 which is-connected to a similar arm associated with the clutch shifter of the companion mechanism by a suitable link 17. As the two sets of mechanism for operating on two stock bars simultaneously are duplicates of each Ethr, a description of one will apply to ot As above stated, when the chuck or gripping jaws are opened, the stock bar is automatically fed forward until its front end contacts with a stop 18 held normally -in arresting position, but movable Yfrom such poA sition for a purpose which will hereinafter appear.

At this point it is deemed advisable in the interest of elucidation, to describe the sequence of operations in the formation of the article shown in Fig. 12, and for this purpose reference ismade to Figs. 8 toll, in. elusive.

At the commencement of the sequence 0I' operations, the gripping jaws being open,

the stock bar is fed forward automatically as heretofore described,puntil its end, shown by dotted lines, Fig. 8, abuts against the stop bar 18. L l,

The gripping jaws are then caused to grip the bar and the same is rotated in the manner hereinafter described, and the cutting tool 19 is moved into contact with the rotating stock and caused to progress towards the -axis thereof until it reaches the position shown in Fig. 8, at which time a cone-shaped head and annular' groove will be turned thereon and therein, the 'end of the-coneshaped head being joined to thev terminal p ortlon of the stock bar, indicated by dotted lines, by so slight a connection that it easily breaks olf, the portion indicated by said dot-` ted lines being, of course, thrown to waste. The power rotation of the chuck is now stopped, vand regardless of where the at sides of the stock come to rest relative to a vertical position, it is turned by means hereinafter described so that it shall be accurately indexed" or positioned with its flat faces perpendicular to the boring and countersinking drills disposed on opposite-sides thereof, these boringLdrills working in a plane perpendicular to -the plane of the cutting tool 19. Y f

One pf these drills 20 isthen advanced as one side, whereafter it is re-l tracted and the other drill 2()n is'advanced to bore or drill from the opposite side (Fig.

i) This prevents any breaking through of kthe stoc and forms a smooth round hole 'Vadtil the end of the shaped portion of Vthe work` (Fig. 10) contaetswith the` stop, as shown in Fig. 11. l

Cutter 19 isnow.advanced, asy described in Fig. 8, to preliminarily shapeethe head of the next article,and effect the severing of the preceding one, which breaks off easily from the partially formed piece.

" Thereafter the cycle of operations is repeated until the'stock barhas been completely/used up.

It will be understood from the-foregoing that the stockbar is gripped firmly by the chuck at all times except when the bar is to be fed forward, so'that said bar is held firmly and accurately by the chuck whilethe cutter 19, drills 20,A 20,and trimmers 21 are operating thereon. I

The cliuck is rotated by a drive belt D passing around a pulley 5b on the chuck spindle 5, and around a pulley,22 on overhead shaft' 22a, which in turn is driven by belt' 22b from shaft 23, which shafts are journaled in bearings in a suitable overhead framework, such for example as wall brackets and interconnected rods supported thereby. The

Achuck ofl the-machine unit remote from the operator is driven from shaft 23 by belt D1. For applying power to shaft 23 to drive th chucks, said Yshaft/is provided with fastvand loose pulleys 24 and 25 respectively, which cooperate with belt 26 connected with any vsuitable overhead source of` power Y (not shown).. Belt 26 is engaged by shifter fork 27 which is under tension of spring 28 w-hich tends constantly to throw it onto the loose pulley and disconnect the drive from the chucks. `A s Movement of the shifter fork ina reverse direction is effected by the flexible element 29 which extends down to and is connected' with a foot or treadle lever 30. .Said shaftV .33 with the treadle leverwhereby the rotation of the shaft is quickly stopped when the Vpedal is depressed to disconnect the drive.

` With the drive on and the operator having grlpped the stock in the chuck by moving lever 12 in the appropriate direction, the

cone cutter 19 is raised into cutting position by hand lever 34 fast on a shaft 35 (Fig. 3) journaled in a. vertically slidable member -or cutter carrier 36 guided in suitable ways on the heady stock. Said shaft 35 carries a. gear.

37 fast thereon which meshes 'with a stationary rack. 38, whereby thegear rollsv on the rack andJ raises the cutter carrier against the tension of spring 39, which effects a quick return ofthe cutter carrier on release of the handle.

Upward movementof the cuftercarrier 1s limited by an abutment 36a thereon coming in contact with an' adjustable stop screw 36b threaded throughan abutment or carrying projection onY the'imachine frame, the screw being locked in adjusted position by a suitable lock nut, as shown clearly in Fig. 4. Havin completed the shaping of the cone and cutting of the annular groove in the' stock, it isnext in order to drill the transverse opening and trim away the opposite `ysides of the cone.

`Before this is done, it is necessary to infsure" that .the stock bar is accurately positioned with ifsflat sides perpendicular-to the plane of the drills, as the mere stopping of the drive may leavg the stock bar at anyv .angle throughout n 360. y

lIo enable this'to be accomplished, I pro-V vide means whigh will be understood from `reference to Figs. 3 and 6. Chuck spindle 5 .1s providedwith a loose gear or pinion 40 lwhich meshes with a slidable rack 41 carried by `reciprocating b'ar or rod v42 `actuated by towards the disc to engage the cooperating shoulders thereon. The other armof the pawlnormally ,engages an abutment member 48"carried by an indexlatch piece .'49 ful-`l crumed on. pin or bolt 50, Whiehholds the pawl out of contact with the disc when hand lever 43 is in normal or retracted position, (Fig. 6).

Assuming that the drive has stopped, and the chuck shaft is tobe indexed to lproper position, the operator Vmoves lever 43 to .the right, Fig. 6,v which causes the rack to rotate gear 40 and arm 44. This moves the tail of the dog or pawl 45 away from' abutment 48 and allows thespring to pull the end of the pawl into contact with theedge of the disc. Ifnoabutment ,recess isl opposite the pawl,

disc until it drops into one or the other of the abutment recesses and will rotate the .it will ride on or slide over the edge of the throw or range of movement of rod 42 being calculated for this purpose. To prevent overthrow of the disc, index latch 49- is pressed upward by a spring 49 into contact with the disc 46.

- The end of the index latch 49 is formed as a pawl to coact with reversely placedshouldered recesses 46b in the edge of the disc 46. As the rack b'ar moves to the right, abutment 41a will slide along the face of lever 49 until ity reaches the low or recessed portion 49h, when the spring 49a will force lever 49 upward into Contact with the edge of the disc and in readiness to engage one or the other of the shoulders 4.61 to positively index or stop the motion of the disc at the precise point desired.

The work is now ready for the drilling and trimming operation of the drills and trimmers, which normally are in continuous operation, but'out of working position, the drills being driven by belts 51 from over head pulleys 51a and the trimming saws by belts 52 from overhead pulleys 52a.

The drills are indicated at 20, 20, and have their carrier shafts journaled in suitable carrier blocks 53 adjustably mounted on slide members 54. The slide members of.

the two units are coupled together bya right and left threaded rod 55, Fig. v2, by which they may be adjusted relative to each other andwhich causes the movement of one to transmit similar movement to the other. The slide member at the front or operators side ofy the machine is provided with a. crank handle 56 which is fast to a gear 57 which meshes with a horizontal rack 58 carried by slide member 54. Upward movement of handle 56 to th'e limit indicated by the upper arrow-head, Fig. 2, moves t-he slide members to cause one set of drills to move to the position shown inI Fig. 9, while downf- .cutters 2l and forces the latter forward to bring the cutters into the po-sition shown in Fig. 10, to trim the sides of the cone.

Carrierl61 is mounted on a slide bar-63 guided in\ and supported by the bracket members 64 and is. normally retracted by spring 65.'

- Movementof the slide in either direction is limited by adjustable stops 66. It may. be noted at this point that provision is made for an independent l and fine or micrometer adjustment of 'each-'drill in an axial direction. For this purpose I make -the'drill stocks or carrier shafts 67 hollow, the drills 20, 20L, being inserted in enlarged tubular bores inthe front ends thereof and locked in working position 'by means of'set screws 67, see Fig. 4.

Each drill has an intermediate rod 68 which extends through the reduced tubular bore of the carrier shaft and abuts at its rear end an adjusting screw 69 tapped into the outer end of t-he drill shaft and provided with a lock nut 69a. l

0n loosening the locking -screw 671 any desired adjustment of the'drillrelative to the carrier shaft may be made in ofrder to accurately posit-ion it in relation to its Work. The belt-s 51 which drivethe drills pass around sheaves 70-on the drill shafts or s indles and around the overhead drive pul eys 51a on shafts 71 and 71a; while the belts 52 which drive the saws pass around idle pulleys of sheaves 7 3 and pulleys 74 on the saw shafts, and also around the overhead drive 82 tends to throw the, belt shifter onto the loose pulley and in driving position, Fig. 7, and the belt is capable ofbeing shifted onto pulley 76 for driving purposes, by a. flexible elelnent 83 connected to a. foo-t treadle 84 which can be held in its depressed position by a swinging latch bar 85.

It is of vital importance that means should be provided to prevent the advance of the drills and saws while the stock is rotating or when it is in other than indexed position, and also to prevent an y stock being` rotated during the drilling and trimming operations. To this end I include in the flexible element 29 a shouldered locking member 86 having a. reduced shank passing through an elongated recess 87a in a.

member 87 secured to the end of the reciprocating indexing rack-bar 42, and vertically guided by a support 88 through which the reduced sha-nkl projects. When the parts are in indexed position, as shown in Fig. 5, at which time the operator manipulates the handle which brings the drills and trimmers possibili tv of the into action, the shoulderedportion of member 86 rests upon the top of the slotted bar i 87 and prevents the depression of treadle 30 and-the consequent application of drive to rotate the stock. When the index lever 43 and rac-k bar 42 are moved 'back to initial position, the slotted bar 87 passes clear of the shouldered portion of member 86 and the treadle is free to "be operated, but while pressed down the index slide cannot be opl erated, due to the inability of the large upper leu to a carrying ta portion of member 86 to enter the slot in `member 87. l

.I nd it desirable to provide air blast n ozzles 90 positioned to blow throughthe chucks to keep them clean, 'the rear ends of the chuck shafts bein flared to facilitate thls and also to enab e the stock to be more readily inserted.

After the member'has been produced by the machine operating in the manner above described, and as illustrated in Fig. 12, it is slotted at the base by means such as a. suitable saw, to provide the strin er receiving slot which enables `a series to While, inthe ioregoing description, I have referred to the usev of bars having flat sides orof substailtially rectangular'shape in cro'ss section, it is'to be understood that I do not limit. myself to stock bars of this particular Ishape, as it is possible to use bars of circular cross section. The flat sided bars are preferable as saving in cost of material and amount to be removed.

In the event of using 'cylindrical stock bars the indexing operation will be unnecessary, but the finished element would have rounded faces unless an additional operation is performed.

It will also have shown the trimming cutters as moving axially of the stock bar, they could, without departing from the spirit of my invention,

be'arranged to move transversely thereof, as for example by being carried by one of the drill slides and moved thereby.

Having .thus described myinvention, what I claim 1s: g l

1. In apparatus of the class described, a tubular Ychuck having gripping jaws with means for o erating them, means for feeding a stock ar therethrough, means for in; termittently rotating said chuck, cuttin means for .cutting a cone-shapedv head an annular Ibase groove in'said stock while rotating, drill means for drilling said stock bar adjacent L the` y'base groove, and indexing means for bringing said stock bar into position with' its iat sldes perpendicular to the axis of the drill means and for positively holding it in such position during the drilling operation.' o

2. In apparatus of the class described, a tubular huck having gripping jaws with means foi` operating them, means for feeding a stock bar therethrough, means yforintermittently rotating said chuck, cutting means for cutting a cone-shaped vhead and annular base groove in said -'stock while rotating, drill means for drilling said stock bar adjacent the base groove, and indexing means for bringingisaid stock bar into posi-pn applied i be understoodthat while I` g the chuck rotating means a ainstthem to advance alternately to bore through a saidl stock bar while held stationar in predetermined position, and means or trimolf opposed faces ofthe cone while so 4. In apparatus ofthe classdescribed,

means for alternately rotating a fiat-sided 'stock bar and holding it against rotation,

means for turning a cone-shaped head and annular base groove thereon while rotating,

a pair of opposed drills, means for causing them to advance alternately to bore throng said stock bar while held stationary, means for trimming oil?l opposed faces of the cone while so held, and means whereby the advance of one of said drills automaticallyv brings the trimming means into operation. v 5.I In combination, means for holding a stock bar, a .pair of opposed drills, a slide carrying said drills with means for reciprocating 1t, trimming means, a carrier therefor movable in a rectilinear line perpendicular to the, line of travel of said slide, and means whereby the movement of the slide controls, the movement of said trimming means.

6. In combination, means for holding a stock bar, a pair of opposed drills, a slide `carrying said drills with means for reciprocating 1t, trimming means, a carrier therefor movable in a rectilinear line perpendicular to the kline of travel of said slide, a spring 'for y,moving saidcarrier in one direction, and cam means carried b the slide for actuating said carrier against t e tension of the spring.

7. In combmation, a hollow chuck carrying gripping jaws with means for operating them, means for rotating said chuck lnter- Imittently, pressing means tending to urge the stock bar through the chuck when the jaws are open, a turmng tool for cooperating with the bar while rotating, a pair of opposed rectilinearly movable drills for drilling said ,stock bar while stationary, a slide carrying said drills, and a sto carried by said slide and movable into an out of the path of the stock bar.y v .f

8. In combination, a hollow chuck carrying gripping jaws with means for operating them, means for rotating said chuck intermittently, pressing means tending to urge the stock bar through the chuck when the jaws are o en, a turning tool for cooperating with the ar while rotating, a pair of opof the stock bar, trimming means, a carrier therefor movable rectilinearly in a path perpendicular to the path of the slide, and means whereby the movement of the slide in a direction to remove'the stop from'the line of the stock bar effects the advance of said carrier. l

9. In combination, a rotary chuck having stock-bar gripping jaws, with means for operating them, means for rotating said chuck intermittently, turning and cutting olf means for acting on'the bar while ro.- tated by the chuck, indexing means for bringing said bar to rest in a`.determined position when the drive to saidchuck is disconnected and devices for operating on the bar after it has been so positioned.

10. In combination, a tubular chuck for receiving a flat-sided stock bar, having gripping jaws with means for operatingv them,

driving means connectible to' and .disconnectible from said chuck, a cutting device for acting on said bar while rotating, drilling means for forming an opening through said stock bar, and indexin .means for positioning said bar with its at sides perpendicular to said drilling means when the drive to the chuck is disconnected.

11. In combinatioma work holding chuck, means connectible to and disconnectible therefrom for lintermittently rotating the same, means for operating onlvthe work while rotating, means for operating on said Work while stationary, and indexing means for properly positioning the stock when the chuck drive is disconnected, comprising a disc fast to the chuck, and having a'pair of y diametrically located ratchet teeth, a pawl member movable about the axis of said disc and normally out of contact therewith, and means for moving said pawl about said axis and for throwing it into contact with said disc.

12. In combination, a workholding chuck, means` connectible to and disconnectible therefrom for; intermittently rotating the same, means forl operating on vthe work While rotating,` mea-ns for operating on said work while stationary, and indexing means for properly positioning the stockiwlien the chuck drive is disconnected, comprising a disc fast to the chuck, and having a pair of diametrioally located ratchet teeth, a pawl member movable about the axis Aof said disc and normally out of contact therewith, and means for moving said pawl about said axis and for throwing it into contact with said disc, said disc. having a pair of reversely 'placed ratchet teeth, and a pawl articulated on a fixed axis and adapted to cooperate with said reversely placed ratchet teeth, and means whereby said pawl is thrown into contact with said disc simultaneously with the action of said first named pawl.

13. In combination, a work holding chuck, means connectible to and disconnectible therefrom for intermittently rotating the saine, means for operating on the work while rotating,'means for operating on said work while stationary, and indexin means for properly positioning the stoc when the chuck drive is disconnected, comprising a disc fast to the chuck, and having a pair of diametrically located ratchet teeth, a gear adjacentl said .disc and rotatable'about the axis thereof, an arm connected with said gear and carrying a pawlcooperating with the teeth on said disc, and means for normally holding the pawl out of contact with the disc. v

14.y In combination, a work holding chuck, means connectible `to and disconnectible therefrom for intermittently rotating the same,` means foroperating on the work while rotating, means for operating on said work while stationary, and indexing means for properly positioning the stock when the chuck ldrive is disconnected, comprising a disc fast to the chuck, and having a pair of diametrically located ratchet teeth, a gear adJacent said disc and rotatable about the axis'thereof, a n arm connected with said gear and ncarrying a pawl cooperating with the teeth on said disc, said disc having also a second pair of ratchet teeth facing in the opposite direction from said first named ratchet teeth, a pawl articulated on a fixed pivot for cooperating with said second pair of ratchet teeth, means wherebyvthe movement of the rack bar controls the action of said pawl, and means carried by said last named pawl for holding the first named pawl out of action when the rack is in'inif tial position. f'

v15. In apparatusof the* class described, a

tubular chuck having gripping jaws with means for operating them, means for feeding a stock bar therethrough, means for intermittently rotating said chuck, cutting means for cutting' a cone-shaped head and annular base groove in said stock while rotating, drill means for drilling said stock bar adjacent the base groove, and indexing means for bringing said' stock bar into position with its flat sides perpendicular to the axis of the drill means and for positively holding it in such position during. the drilling operation, and means for trimming off o posed faces of the cone-shaped head whille so held. v

In testimony whereof, I affix my signature.

JOSEPH E. PERRAULT. 

